import time
import struct
from typing import Dict, Any, List
from config_loader import PlcConfig, PlcRegister
from utils.logger import get_logger

logger = get_logger("fins_client.py+FINSReader")

class FINSReader:
    def __init__(self, plc_config: PlcConfig):
        self.config = plc_config
        self.connected = False
        # FINS连接相关参数
        self.host = plc_config.connection.server_ip
        self.port = plc_config.connection.server_port
        self.client = None
        
    def connect(self) -> bool:
        """连接到FINS设备"""
        try:
            # 注意：实际实现需要使用pyomron或其他FINS库
            # 这里仅为演示目的，实际使用时需要导入相关库
            logger.info(f"FINS connecting to {self.host}:{self.port}")
            # 示例：self.client = FinsCommand(self.host, self.port)
            # 示例：self.client.connect()
            self.connected = True
            logger.info(f"FINS connected to {self.host}:{self.port}")
            return True
        except Exception as e:
            logger.error(f"Failed to connect to FINS device: {e}")
            self.connected = False
            return False
            
    def disconnect(self):
        """断开FINS连接"""
        try:
            # 示例：if self.client: self.client.close()
            pass
        except Exception as e:
            logger.error(f"Error disconnecting from FINS device: {e}")
        finally:
            self.connected = False
            logger.info("FINS client disconnected")
        
    def read_register(self, register: PlcRegister) -> Dict[str, Any]:
        """读取单个寄存器数据"""
        result = {}
        try:
            if not self.connected:
                logger.info("FINS not connected, attempting to connect...")
                if not self.connect():
                    logger.error(f"Cannot read register {register.name_en} due to connection failure")
                    return result
            
            # 根据FINS协议读取数据
            # 这里需要根据register参数读取实际数据
            # 示例：data = self.client.memory_read(register.addr[0], register.len)
            # 示例：value = self._decode_data(register, data)
            
            # 暂时返回模拟数据
            value = self._decode_mock_data(register)
            result[register.name_en] = value
            logger.info(f"Successfully read FINS register {register.name_en}: {value}")
            
        except Exception as e:
            logger.error(f"Error reading FINS register {register.name_en}: {e}")
            self.connected = False
            
        return result
        
    def _decode_mock_data(self, register: PlcRegister) -> Any:
        """模拟数据解码，实际实现需要根据FINS协议处理"""
        import random
        if register.type == "uchar":
            return "MOCK_FINS_DATA"
        elif register.type == "float":
            return round(random.uniform(0, 100), 2)
        elif register.type == "uint16_t":
            return random.randint(0, 65535)
        elif register.type == "uint32_t":
            return random.randint(0, 4294967295)
        else:
            return 0
            
    def read_all_registers(self) -> Dict[str, Any]:
        """读取所有寄存器数据"""
        if not self.connected and not self.connect():
            return {}
            
        all_data = {}
        for reg in self.config.registers:
            reg_data = self.read_register(reg)
            all_data.update(reg_data)
            time.sleep(self.config.connection.cycle_delay / 1000)
        
        logger.info(f"Completed reading all FINS registers, total {len(all_data)} registers read")
        logger.debug(f"All FINS register data: {all_data}")
        return all_data